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Nagai J, McAllister AJ. Expected performance under repeated hybrid male cross and crisscross mating systems. Theor Appl Genet. 1982;61(2):177-82doi: 10.1007/BF00273887.
Nagai, J., & McAllister, A. J. (1982). Expected performance under repeated hybrid male cross and crisscross mating systems. TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 61(2), 177-82. https://doi.org/10.1007/BF00273887
Nagai, J, and McAllister, A J. "Expected performance under repeated hybrid male cross and crisscross mating systems." TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik vol. 61,2 (1982): 177-82. doi: https://doi.org/10.1007/BF00273887
Nagai J, McAllister AJ. Expected performance under repeated hybrid male cross and crisscross mating systems. Theor Appl Genet. 1982 Jun;61(2):177-82. doi: 10.1007/BF00273887. PMID: 24270341.
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Theor Appl Genet. 1982 Jun;61(2):177-82. doi: 10.1007/BF00273887.

Expected performance under repeated hybrid male cross and crisscross mating systems.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

J Nagai, A J McAllister

Affiliations

  1. Animal Research Centre, Agriculture Canada, Ottawa, Ontario, Canada.

PMID: 24270341 DOI: 10.1007/BF00273887

Abstract

The expected performance of two crossbreeding systems, the crisscross (CC) and repeated hybrid male cross (RHMC) was compared. These systems are of particular interest for less prolific species such as dairy cattle. Under the CC, the expected performance fluctuated over generations while under the RHMC, performance was constant after the F1 generation. After a few generations of crossing, the ratio of the average performance of the two alternative CCs to the performance under RHMC approached (6+4H)/ (6+3 H) where H was a coefficient indicating the degree of heterosis. When the parent breed difference (D) was small (10%) and heterosis (H) substantial (30%), the CC involving the first back cross to the superior sire breed was expected to exceed the RHMC by 6% after a few generations of crossing. The expected performance under CC and RHMC for various values of D and H was calculated.

References

  1. Theor Appl Genet. 1980 Jul;57(4):59-69 - PubMed
  2. J Dairy Sci. 1968 Aug;51(8):1275-83 - PubMed
  3. J Dairy Sci. 1969 Apr;52(4):498-506 - PubMed

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